Jigger.



w. SELTNER. I

JIGGBR,

I I APPLICATION FILED MAB-J20. 1906. I

- 987,179. Patented M21221, 1911;

a sums-sum" 1.

W. SELTNER.

JIGGER.

APPLICATION FILED MABUZO, 19 06.

Patented Mar.,,21, 1911.

- 3 SHEETS-BHEET 2.

n1: vcmms PETERS c0., WASHINGTON. z:v c. .7;

.SELTNER..

JIGGBR. APPLICATION FILED MAR. 20, 190B,

' Patented Mar. 2-1, 1911.

- a s nnTs-snnnT a.

.1 and 2 show, by way of UNITED STATES PATENT OFFICE.

WILI-IELM SEL'INER, OF SOI-ILAN, AUSTRIA-HUNGARY.

JIGGER.

To all whom it mag concern:

Be it known that I, WILHELM SELTNER, a subject of the Emperor ofAustria-Hungary, residing at Schlan, Bohemia, Empire of AustriaIIungary,have invented certain new and useful Improvements in J iggers, of whichthe following is a specification.

As is well known, in order to regulate the stroke of the material to besorted on jiggers, below the screen proper, there was used a second mealbed, by the adjustment of which the screen was regulated.

The method according to this invention consists in efi'ecting theseparation on two or more superposed screens in the same separatingchamber or hutch of a jigger. This process must not be confounded withthe separation by means of two superposed movable screens in water or onfixed superposed screens in pulsating water, in which the material orpart of the material passes through the screen for the purpose ofeffecting the desiredseparation.

The material treated on the superposed screens can be of diiferent kindsand sizes of grain, but in most cases it is preferable to supply theupper screens with the finer, and the lower screens with the coarser, orboth with the same kind of material, the separation and discharge of thematerial supplied to each screen b ing eflected above the screensurface.

In the accompanying drawing :Figures example, in crosssection and planrespectively, two jiggers arranged side by side, on which the materialcan be treated by the method according to this invention. Fig. 3 shows alongitudinal section of the jigger with the transport devices (bucketelevators), Fig. 4 a plan and Fig. 5 is a transverse sectional view online 5-5 of Fig. 3.

Referring now to Figs. 1 and 2 only The jiggers are provided with two suerposed screens a and 5. Water is force up in the well-known manner fromthe pressure chamber p by means of a piston p, etc. The inlets anddischarges for the material can also be arranged on the jigger invarious ways. In the construction illustrated, for instance, rawmaterial is supplied at c d to Specification of Letters Patent.

Application filed March 20, 1906.

Patented Mar. 21, 1911. Serial No. 307,123.

the screens. The discharge of the lighter particles takes place on thesame side of the two screens at c f, and of the specifically heavierparticles at g h, whence the products are supplied to bucket elevatorsor similar devices at r and t, more fully described in reference toFigs. 35, (for the purpose of depriving them of water, sorting andshipping). A water outlet is arranged only at 6 with the discharge ofthe specifically lighter portions of the material at the upper screen a.

In order to adapt the rising or pressure of water for the upper screento the require ments of each case and to enable it to be regulated, itis preferable to arrange a pipe a leading from the water chamber Z ofthe bot-tom screen, to project beyond the level of water, the pipe beingsuch that its cubic contents can be increased or reduced by means of anadjustable device such as a piston 11 which can be adjusted up and downin the pipe at. In this way the pressure of water when excessive for theproper screening on the upper screen, may be compensated by the pipe.If, however, it is desired to have a stronger pressure of water in theupper screen, pipes 0 are arranged to lead from the bottom boX or hutchof the jigger above the bottom screen, that is to say up to below theupper screen. A valve 8 regulates the inlet for the raw material to thebottom screen and moreover, for the purpose of rendering all the partsaccessible, the jigger is provided with folding screen portions k and amanhole m.

Referring now to Figs. 3-5- illustrating more particularly the conveyingdevices The specifically lighter material passes over the edge a or 6,while the specifically heavier material is discharged through the slot 0or d. The further course of the material is as follows :The lighter kindfrom the upper sieve is carried oif direct by the water current. Thelighter kind from the lower seive falls over ehe edge 6 through theaperture 6 to the openings f and arrives through the latter into thecompartment 9. The material slides over the oblique bottom of thisdivision and falls through the openings it into the trough of thevertical bucket situated in the middle of the width of said aperture 6so that the said heavy material can pass down into the chamber h. In hvthis heavy kind from the upper sieve mixes with the same kind from thelower sieve and slides as far as the opening 71 and through theconnecting piece It into the trough of the oblique bucket elevatorswhich discharge all the heavy material for further conveyance. Theactuation of the two bucket elevators takes place by means of thetransmission which moves the first-motion-shaft n or m by means ofbelt-transfer and from there drives the wind-beam by means of toothedwheels. The wind-beam and the first-motion shaft of the vertical bucketelevators are mounted on the supporting frame 0. The latter is mountedabove the jigger and serves also as a support for the frame of theoblique bucket elevators.

hat I claim as my invention and desire to secure by Letters Patent is 1.A jigger having a water chamber, a plurality of superposed screenstherein of fine mesh through which the material treated cannot pass,means for forcing the water alternately upward and downward through thescreens, means for applying the material to be treated to the screensand means for discharging the lighter and heavier materials separatelyfrom above the surface of each of the screens.

2. A jigger having a water chamber, a plurality of superposed screenstherein of fine mesh through which the material treated cannot pass,means for forcing the water alternately upward and downward through thescreens, independent means for regulat-ing the pressure of water forcedthrough the various screens, means for supplying the material to betreated to the screens and means for discharging the lighter and heaviermaterials separately from above the surface of each of the screens.

3. A jigger having a Water chamber, a plurality of screens arranged oneabove another in the water chamber, means for forcing the wateralternately upward and downward through the screens, a pipe extendingupward from the water space of the lower screen, and means for varyingthe operative cubic content of said pipe.

4. A jigger having a main water chamber, a plurality of screens for thematerial to be treated said screens being arranged one above the otherin the main water chamber, a pressure chamber communicating with themain water chamber, a piston capable of reciprocating in the pressurechamber and forcing the water alternately upward and downward throughthe screens, a pipe extending upward from the water space of the lowerscreen and means for varying the op erative cubic content of said pipe,means for supplying the material to be treated to the screens, and meansfor discharging the lighter and heavier materials separately.

5. A jigger having a main water chamber, a plurality of screens for thematerial to be treated, said screens being arranged one above the otherin the main water chamber, a pressure chamber communicating with themain water chamber, a piston capable of reciprocating in the pressurechamber and forcing the water alternately upward and downward throughthe screens, a pipe extending upward from the water space of the lowerscreen, means for varying the opera tive cubic content of said pipe,supply chutes arranged at one end, separate discharge chutes for thelighter and the heavier materials arranged at the opposite ends of thescreens to those at which the supply chutes are arranged, and means forcontrolling the supply and discharge.

6. A jigger having a water chamber, a plurality of screens arranged oneabove another in the water chamber, means for forcing the wateralternately upward and downward through the screens, a pipe leading fromthe bottom box of the jigger and ending in the water space above thelower screen.

7 A jigger having a main water chamber, a plurality of screens for thematerial to be treated, said screens being arranged one above the otherin the main water chamber, a pressure chamber communicating with themain water chamber, a piston capable of reciprocating in the pressurechamber and forcing the water alternately upward and downward throughthe screens, a pipe leading from the bottom box of the jigger and endingin the water space above the lower screen, means for supplying thematerial to be treated to the screens, and means for discharging thelighter and heavier materials separately.

8. A jigger having a main water chamber, a plurality of screens for thematerial to be treated, said screens being arranged one above the otherin the main water chamber, a pressure chamber communicating with themain water chamber, a piston capable of reciprocating in the pressurechamber and forcing the water alternately upward and downward throughthe screens, a pipe leading from the bottom box of the jigger and Intestimony hereof have signed my ending in the Water space above thelower name to thisspecrficatlon 1n the presence of screen, supply chutesarranged at one end, two subscribing wltnesses.

separate discharge chutes for the lighter WILHELM SELTNEB and heaviermaterials arranged at the 0pposite ends of the screens to those at whichWitnesses: the supply chutes are arranged, and means ADoLPH FISCHER, forcontrolling the supply and discharge. ARTHUR SOHWEINBURG.

Copies of this patent may be obtained for five cents each, by addressingthe f Commissioner of Patents, Washington, D. C.

